System for printing unique interactive document in response to print request

1. A system for printing and interacting with documents, the system comprising: (a) a computer system configured for: receiving a print request for printing a document; allocating a unique document identifier to said document in response to receiving said print request; and associating the document identifier with a description of the document; (b) a printer for printing the document containing human-readable content together with a coding pattern on a surface, said coding pattern encoding a plurality of locations on the surface and further identifying the document identifier; and (c) an optically imaging pen for sensing a portion of the coding pattern during handwritten input on the document and for generating a signal indicative of the unique document identifier and one or more positions of the pen relative to the document, wherein the computer system is further configured for: receiving the signal from the pen; determining the document identifier and one or more positions of the pen; retrieving the description associated with the document identifier; interpreting the one or more positions as a path of handwritten input; and updating the description with information corresponding to the handwritten input.

2. The system of claim 1 , wherein the coding pattern is printed on the surface as a collection of tags.

3. The system of claim 2 , wherein the tags are printed using infrared-absorptive ink.

4. The system of claim 1 , wherein the printer prints the coded data tags to fill the surface.

5. The system of claim 1 , wherein the computer system is configured to receive the signal via a wireless connection with the pen.